I added TwentyTwenty from Zurb to my website. Useful for both before/after edits and changing scenes. Here are some test shots by way of example. I found the installation to be pretty straightforward, with plenty of online resources out there to match your level of code competence. I'm curious to run speed tests on this though...
A Yashica FX-3 Super SLR I am restoring. 
Purchased from Goodwill, which involved haggling with their strange Eastern Euro manager.
My friend Peter. We tried to go storm chasing, but got repeatedly trolled by the cells.
I was pleasantly surprised at how close of a match my two panoramas were. I just eyeballed it.